As frontier materials, graphene oxide (GO) and graphene have penetrated almost all research areas and advanced numerous technologies in sensing, electronics, energy storage, catalysis, water treatment, advanced composites, biomedical, and more. However, the affordable large-scale synthesis of high-quality GO and graphene remains a significant challenge that negatively affects its commercialisation. In this article, firstly, a simple, scalable approach was demonstrated to synthesise high-quality, high yield GO by modifying the improved Hummers method. The advantages of the optimised process are reduced oxidation time, straightforward washing steps without using coagulation step, reduction in cost as eliminating the use of phosphoric acid, use of minimum chemical reagents, and increased production of GO per batch (~ 62 g). Subsequently, the produced GO was reduced to reduced graphene oxide (rGO) using three different approaches: green reduction using ascorbic acid, hydrothermal and thermal reduction techniques. The GO and rGO samples were characterised using various microscopy and spectroscopy techniques such as XRD, Raman, SEM, TEM, XPS and TGA. The rGO prepared using different methods were compared thoroughly, and it was noticed that rGO produced by ascorbic acid reduction has high quality and high yield. Furthermore, surface (surface wettability, zeta potential and surface area) and electrical properties of GO and different rGO were evaluated. The presented synthesis processes might be potentially scaled up for large-scale production of GO and rGO.

In recent times of global turbulence, democracies in many countries have been tested for their resilience and there is a need to focus on determinants of political brand preference. For political parties, from political marketing strategy point of view, analyzing factors impacting voters’ party preference is becoming important for better understanding of voters to influence and predict voting behavior. Research studies propagate that consumers can experience a feeling of love for their brand (Albert et al., 2008; Batra et al., 2012). Carroll and Ahuvia, (2006) view that consumer feels love for the brand when a brand reaches both high real and desired level of integration with the consumer’s sense of self. Brand love is the degree of strong emotional attachment a satisfied consumer has for a particular brand. Brand love includes passion and declarations of love for the brand. Though brand love has been studied in the context of consumer market, we still know little about whether voters feeling of brand love for the political party they prefer. In this backdrop, in this study, we have examined impact of political brand love on voters’ preference of the political party. As brand love is a relational construct, objective is to investigate the type of causal relationship exists among brand love and the related constructs. In this study, we have taken India, largest democracy of the world, as our focal point of study. In this paper we propose to study the mediation effects of inner self (IS) and social self (SS) while estimating the relationship between brand love (BL) and brand preference (BP) and brand trust (BT) and BP. Additionally we also look at the relationship between BL and BT. The results as a whole shows that both brand trust and brand love have significant positive impact on brand preference. Higher brand trust leads to higher brand preference both directly and when both direct and indirect effects are considered as a whole. On the other hand there is no statistically significant indirect effect of brand trust on brand preference through inner self or social self. In case of brand love on the other hand all the effects are statistically significant. Higher brand love increases brand preference directly and also indirectly through inner self and social self. This implies that higher brand inner self and social self enhances the impact of brand love on brand preference.

서평

“｢어쉰의 방랑｣은 빅토리아왕조시대의 삭막함에서 벗어나서 과거와 미래사이의 순간을 풍요롭게 만든다. 이 시의 가장 좋은 부분에서는 심미주의자들의 장식성이나 요정들의 세계를 벗어난다. 어쉰의 여행은, 요정의 나라건 이니스프리건, 쿨장원이건 더블린의 우체국이건, 그의 노래의 주제가 된다. 다른 어느 시인보다, 예이츠는 빅토리아시대의 시에서 현대시로 오는 이 길을 개척한다. 이 업적만으로도, 그는 진정 고양이들의 왕이 되는 것이다.”

High hardness of P/M parts can be obtained in the cooling section of the sintering furnace by using sinter hardenable materials, thus the post-sintering heat treatment can be eliminated. However, the sinter hardened materials would have difficulties in secondary machining if it is required, which will limit the applications of sinter hardenable materials in the machined parts. Recent development in warm compaction technology can enable us not only to achieve the high green density up to , but also the high green strength which is needed for green machining. Therefore by using warm compaction technology, the green machining can be applied to sinter hardenable materials for the high density, strength and hardness P/M parts. In the present study, a pre-alloyed steel powder, ATOMET4601, was used by mixing with 2.0% copper, 1.0% nickel, 0.9% graphite and a proprietary lubricant using a binder treatment process - FLOMET. The specimens were compacted and green machined with different machining parameters. The machined surface finish and part integrity were evaluated in selecting the optimal conditions for green machining. The possibility of applying the green machining to the high-density structural parts was explored.